<div style="FONT-FAMILY: Times New Roman; COLOR: rgb(0, 0, 0); FONT-SIZE: 16px">Hi All;<br />How does one adjust the cables to the 4 lever ventilation system?&nbsp; I'm getting some blow by when the levers are in the off position.&nbsp; I am aware of the problem with degrading seals, but was wondering it there was a way to pull the doors shut a little tighter.<br /><br />Dave B.<br /></div>